Questions
1. A particle accelerates at
4
m s
โ2
from rest for 8 s. Find its final
velocity.
2. Find the resultant force acting on a 6 kg mass accelerating at
5
m s
โ2
.
3. A particle has displacement:
s
=3
t
2+2
t
Find its velocity.
4. Using your answer to Q3, find the velocity when
t
=4
.
5. A car travels at
25
m s
โ1
and brakes uniformly to
5
m s
โ1
in 4 s.
Find its acceleration.
6. A 4 kg mass moves at
12
m s
โ1
. Find its momentum.
7. State Newton's Second Law.
8. A particle starts from rest and accelerates at
2
m s
โ2
for 10 s. Find
the distance travelled.
9. A force of 84 N acts on a body producing acceleration
7
m s
โ2
. Find
the mass.
10. A particle moves with velocity:
v
=2
t
2+3
Find its acceleration when
t
=5
.
Answers
1.
32
m s
โ1
2. 30 N
3.
v
=6
t
+2
4.
26
m s
โ1
5.
โ5
m s
โ2
6.
48
kg m s
โ1
7. Resultant force = mass ร acceleration.
8. 100 m
9. 12 kg
10.
20
m s
โ2
